SU123883A1 - Method and device for creating fish-attracting speeds in the feeding channel of a fish passageway - Google Patents

Description

In the aqueduct channels to fish passageway gates filled with water from the upstream, to attract fish to sluice chambers, attracting fish speed is often obtained by passing an additional volume of water.

Their structures and currently known schemes of such fish passage locks attract fish with water velocities in supply channels usually due to the water consumption of the upstream fish.

At the same time, the energy of the water is either quenched on the slatted floors, which leads to significant losses of it, or is transferred to special turbine units, while fish passageways turn into complex and expensive structures.

According to the proposed method of creating attractive water velocities of a fish, its flow from the upstream is significantly reduced and this eliminates the need for a damper device. This is achieved by mixing the upstream head water in the mixing chamber with downstream water, sucked in by the energy of the water entering the chamber from the upstream.

A device for implementing this method is performed in video. a mixing chamber connected by a pipeline to the upper reach and provided, for the entry of water from the lower reach by way of suction, lateral feeding trays.

FIG. 1 shows a fish gateway using the proposed device, in longitudinal section, and FIG. 2 is the same in section along AA-BB in FIG. one.

According to the invention, in order to create attractive water velocities in the feed channel I of the fish passageway 2, water from the upper

No. 123883

the reach of pipeline 3 and distribution pipelines 4 enters the mixing chamber 5. At the same time, due to pressure, the water acquires greater speed. In the mixing chamber, the upstream water moving at high speed draws water from the downstream, escaping into the mixing chamber through the side feed trays 6, and mixes with it. As a result of the displacement, the flow of water coming from the upstream and having a greater speed at the entrance to the mixing chamber, and the flow of water from the downstream receive a common speed and are directed to the feed channel / to attract fish.

Speed adjustment in the feed channel I, depending on the breed of passing fish, is performed by changing the amount of water from the upstream by using valve 7 of pipeline 3. This valve can also be performed by valve 8 on distribution pipelines 4.

With an increase in the downstream water horizons, and hence the depths in the feed channel and mixing chamber, additional distributors are included.

Distribution piping 4 is installed around the perimeter of the mixing chamber to increase the contact area of water flows from the upstream and downstream.

To protect against clogging of the pipeline, a grate 9 is installed on the intake of water from the upstream and distribution pipelines at the inlet section of the pipeline.

For the period of inspections and repairs, the mixing chamber is insulated from the downstream water by the worker (when locking) by the shutter 10 and spans installed in the slots 11 of the walls of the feeding trays.

In order to prevent the fish from the downstream from entering the mixing chamber in the lateral feeding trays 6 and the feed channel / electrical fenders 12 are installed.

Subject invention

Claims (2)

1. A method of creating fish-attracting speeds in the feed channel of a fish passage gateway filled with water from the upstream, characterized in that, in order to reduce the water flow from the upstream and eliminate the need for-absorbers, the speeds are produced by mixing in the mixing chamber the upstream head water with downstream water being sucked in by the energy of the water entering the chamber from the upstream. 2. A device for carrying out the method according to claim 1, characterized in that its mixing chamber with the upper pool is connected by a pipeline, and for the inflow of water from the lower pool by suction, it is equipped with side feed trays.